Animal Feedstuff Overview and Characteristics
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Animal Feedstuff Overview and Characteristics

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Questions and Answers

What is the definition of a feedstuff?

Any substance suitable for animal feed; several feedstuffs are combined to provide a balanced diet.

What are the desirable characteristics of feedstuffs? (List 6)

  1. Provide nutrients that are biologically available 2. No toxins or pathogens 3. Palatable 4. In a physical form that can be easily handled 5. Available in large enough quantities 6. Economical.

What is the definition of dry forages and roughages?

All forages that are cut and cured and other products with more than 18% Crude Fiber or 35% cell walls (dry basis).

What is the disadvantage of having a high cell wall content in dry forages and roughages?

<p>Low in net energy/unit weight.</p> Signup and view all the answers

What is the definition of pasture, range plants, and forages fed fresh?

<p>All forage feeds either not cut or cut and fed fresh (soilage/green chop).</p> Signup and view all the answers

What are the main crops used for silages?

<p>Grass and legume forages and corn.</p> Signup and view all the answers

What are energy feeds?

<p>Products with less than 20% protein or less than 18% crude fiber or 35% cell walls (dry basis).</p> Signup and view all the answers

Examples of energy feeds?

<p>Cereal grains, sorghums, and byproduct feeds.</p> Signup and view all the answers

What are protein supplements?

<p>20% or more crude protein.</p> Signup and view all the answers

Where do protein supplements come from?

<p>Oil meals and animal origin.</p> Signup and view all the answers

What are examples of additives?

<p>Mold inhibitors, antioxidants, antibiotics, flavors, enzymes, hormones, buffers, and direct-fed microbials.</p> Signup and view all the answers

What is the major feed in the US for dairy, beef, and horses?

<p>Pasture.</p> Signup and view all the answers

What are the incentives to use pasture?

<ol> <li>Less labor 2. Possibly cheaper to produce than other forages 3. Some lands may not be used agriculturally except as pasture.</li> </ol> Signup and view all the answers

What are the essential qualities of pasture?

<ol> <li>Made as enduring as possible 2. Growth should start early and continue late into the fall 3. Form a continuous compact turf 4. Variety of plants for growth in different conditions.</li> </ol> Signup and view all the answers

Increasing maturity results in __________ protein content.

<p>Reduced.</p> Signup and view all the answers

Increasing maturity results in __________ energy content.

<p>Reduced.</p> Signup and view all the answers

Increasing maturity results in __________ fiber content.

<p>Increased.</p> Signup and view all the answers

Increasing maturity results in __________ mineral content.

<p>Decreased.</p> Signup and view all the answers

Increasing maturity results in __________ carotene content.

<p>Reduced.</p> Signup and view all the answers

What is the risk for cattle and sheep grazing pastures high in legumes?

<p>Bloat.</p> Signup and view all the answers

_______ decrease palatability because of a bitter taste.

<p>Tannins.</p> Signup and view all the answers

What can occur in all livestock grazing sorghum following severe drought, early frost, or heavy trampling?

<p>Prussic acid poisoning.</p> Signup and view all the answers

What do white clover and alfalfa contain that can cause reproductive problems?

<p>Estrogenic compounds.</p> Signup and view all the answers

What can result in a malformed fetus if ingested by a pregnant animal?

<p>Alkaloids.</p> Signup and view all the answers

What is found in sweet clover leaves that results in a decrease in palatability?

<p>Coumarin.</p> Signup and view all the answers

What causes nitrate poisoning?

<p>A high accumulation of nitrates in forages from nitrate fertilization or drought.</p> Signup and view all the answers

What is one of the most widely recognized problems in cattle grazing lush, new-growth forage?

<p>Hypomagnesemia or grass tetany.</p> Signup and view all the answers

What does green chop refer to?

<p>Fresh forage that has been cut and chopped in the field and then fed directly to livestock.</p> Signup and view all the answers

What are the advantages of green chop?

<ol> <li>Produces maximum yield of nutrients/acre 2. Lower nutrient losses compared with other harvesting procedures.</li> </ol> Signup and view all the answers

What are the disadvantages of green chop?

<ol> <li>Lack of uniform quality from day to day 2. Labor required to harvest and feed daily.</li> </ol> Signup and view all the answers

What is hay?

<p>Produced by dehydrating green forage to a moisture content of 15%.</p> Signup and view all the answers

Study Notes

Feedstuff Overview

  • Defined as any substance suitable for animal feed; combines several feedstuffs for a balanced diet.
  • Serve as raw materials for animal production.

Desirable Characteristics of Feedstuffs

  • Nutrients must be biologically available.
  • Free from toxins and pathogens.
  • Should be palatable.
  • Must have a manageable physical form.
  • Available in sufficient quantities.
  • Should be economical and cost-effective.

Dry Forages and Roughages

  • Comprise forages cut and cured with more than 18% crude fiber or 35% cell walls (dry basis).
  • High cell wall content results in low net energy per unit weight.

Fresh Forages

  • Include pasture, range plants, and forages fed fresh (soilage or green chop).

Silage Crops

  • Main crops for silages are grass, legume forages, and corn.

Energy Feeds

  • Products contain less than 20% protein and not more than 18% crude fiber or 35% cell walls (dry basis).
  • Examples include cereal grains, sorghums, and byproduct feeds.

Protein Supplements

  • Defined as having 20% or more crude protein.
  • Sourced from oil meals and animal origin.

Additives in Animal Feed

  • Common additives include mold inhibitors, antioxidants, antibiotics, flavors, enzymes, hormones, buffers, and direct-fed microbials.

Importance of Pasture

  • Major feed source in the US for dairy, beef, and horses.
  • Offers benefits like reduced labor, cost-effectiveness, and use of non-agricultural land.

Essential Qualities of Pasture

  • Should be resilient and enduring.
  • Must support early growth in the season and continue into late fall.
  • Should form a compact turf to resist trampling.
  • A diverse plant variety aids growth in varying soil conditions.

Maturity Effects on Forage Composition

  • Increasing maturity results in reduced protein, energy, and carotene content.
  • Higher maturity is linked to increased fiber content and decreased mineral content.

Grazing Risks

  • Cattle and sheep grazing high-legume pastures face a risk of bloat.
  • Tannins decrease palatability due to a bitter taste.
  • Prussic acid poisoning can occur in livestock grazing sorghum after drought or trampling.
  • Estrogenic flavonoids in white clover and alfalfa can cause reproductive issues.
  • Alkaloids can cause fetal malformations in pregnant animals.
  • Coumarin found in sweet clover decreases palatability.
  • Nitrate poisoning from high nitrate accumulation can lead to abortion or death in livestock.

Common Issues in New-Growth Forage

  • Hypomagnesemia, or grass tetany, is a recognized problem in cattle grazing lush forages.

Green Chop Definition and Benefits

  • Fresh forage cut, chopped, and fed directly in confinement.
  • Advantages include maximum nutrient yield per acre and lowered nutrient losses during harvest.

Green Chop Disadvantages

  • Quality inconsistency day-to-day.
  • Requires labor for daily harvest and feeding.

Hay Production

  • Hay is created by dehydrating green forage to a moisture content of 15%.

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Description

This quiz covers the essential concepts of feedstuffs suitable for animal feeding, including their desirable characteristics and classifications. It explores various types of feed such as dry forages, fresh forages, silage crops, and energy feeds. Test your knowledge on what makes feedstuffs effective and valuable in animal nutrition.

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